1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright (c) 2014 Nicira, Inc.
 
 
 
 
 
 
 
 
 
 4 */
 5
 6#ifndef _NET_MPLS_H
 7#define _NET_MPLS_H 1
 8
 9#include <linux/if_ether.h>
10#include <linux/netdevice.h>
11#include <linux/mpls.h>
12
13#define MPLS_HLEN 4
14
15struct mpls_shim_hdr {
16	__be32 label_stack_entry;
17};
18
19static inline bool eth_p_mpls(__be16 eth_type)
20{
21	return eth_type == htons(ETH_P_MPLS_UC) ||
22		eth_type == htons(ETH_P_MPLS_MC);
23}
24
25static inline struct mpls_shim_hdr *mpls_hdr(const struct sk_buff *skb)
26{
27	return (struct mpls_shim_hdr *)skb_network_header(skb);
28}
29
30static inline struct mpls_shim_hdr mpls_entry_encode(u32 label,
31						     unsigned int ttl,
32						     unsigned int tc,
33						     bool bos)
34{
35	struct mpls_shim_hdr result;
36
37	result.label_stack_entry =
38		cpu_to_be32((label << MPLS_LS_LABEL_SHIFT) |
39			    (tc << MPLS_LS_TC_SHIFT) |
40			    (bos ? (1 << MPLS_LS_S_SHIFT) : 0) |
41			    (ttl << MPLS_LS_TTL_SHIFT));
42	return result;
43}
44
45#endif

 
 1/*
 2 * Copyright (c) 2014 Nicira, Inc.
 3 *
 4 * This program is free software; you can redistribute it and/or
 5 * modify it under the terms of version 2 of the GNU General Public
 6 * License as published by the Free Software Foundation.
 7 *
 8 * This program is distributed in the hope that it will be useful, but
 9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 */
13
14#ifndef _NET_MPLS_H
15#define _NET_MPLS_H 1
16
17#include <linux/if_ether.h>
18#include <linux/netdevice.h>
 
19
20#define MPLS_HLEN 4
21
22struct mpls_shim_hdr {
23	__be32 label_stack_entry;
24};
25
26static inline bool eth_p_mpls(__be16 eth_type)
27{
28	return eth_type == htons(ETH_P_MPLS_UC) ||
29		eth_type == htons(ETH_P_MPLS_MC);
30}
31
32static inline struct mpls_shim_hdr *mpls_hdr(const struct sk_buff *skb)
33{
34	return (struct mpls_shim_hdr *)skb_network_header(skb);
35}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
36#endif